Sex Chromosomes and Sex Determination in Lepidoptera

  title={Sex Chromosomes and Sex Determination in Lepidoptera},
  author={W. Traut and Ken Sahara and F. Marec},
  journal={Sexual Development},
  pages={332 - 346}
The speciose insect order Lepidoptera (moths and butterflies) and their closest relatives, Trichoptera (caddis flies), share a female-heterogametic sex chromosome system. Originally a Z/ZZ (female/male) system, it evolved by chromosome rearrangement to a WZ/ZZ (female/male) system in the most species-rich branch of Lepidoptera, a monophyletic group consisting of Ditrysia and Tischeriina, which together comprise more than 98% of all species. Further sporadic rearrangements created multi-sex… 

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